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Optimism effective of solar collector at the calculation heat capacity transfer fluid


M. Safarov1, M. Anaqulov1, J. Zaripov1, S. Nazirov1, M. Zaripova1 and S. Tagoev1

1Tajik Technical University after named by ac. M.S.Osimi, Tajikistan

Keywords: solar energy, heat transfer, solar collectors
property: intensive radiations solar collectors, specific heat capacity
material: heat capacity transfer

The availability of energy and peoples ability to harness that energy in useful ways has transformed our society. A few hundred years ago, the greatest fraction of the population struggled to subsist by producing food for local consumption. Now, is many countries a small fraction of the total work force produces abundant food for the entire population, and much of the population is thus freed for other pursuits [1,2,5]. We are able to travel great distance in short times by using a choice of conveyances (including trips to earth orbit as well as our nearest natural satellite for some); we can communicate instantaneously with persons anywhere on earth; and we control large amounts of energy at our personal whim in the form of solar energy, electric tools and appliances, and comfort conditioning in our dwellings. As a result of the development of the science and application of thermo-dynamics, our ability to obtain energy, transform it, and apply it to society’s needs has brought about the change from agrarian to modern society. From our definition Of thermodynamics, then, clearly the study of this discipline not only is useful to engineers in their professional lives but also has played and will continue to play, a vital role in how society evolves. In order to be compared the thermal performance of flat-plate solar collec-tors, some testing methods have been developed. The parameter (T1-To)/IT is calculated for each averaging time interval and plotted against the calculated value of η for the same time period. Values of instantaneous efficiency η can be calculated by the following equation using the mass flow rate of the heat transfer fluid (1) [3,4]. , (1) than, - Values of instantaneous efficiency collectors, сp- specific heat capacity heat transfer fluid, (Т0-Тi) –deference temperature heat transfer fluid, at the going out and entrance to collectors, Iт- intensive radiations solar collectors, Ас-area collectors. This is primarily caused by heat loss coefficients’, which increase with increasing temperature.

References
  1. G.M.Kondratev, Regulyarniy teplovoy reghim. –M: GITTL,1954, pp. 341-376

  2. G.M.Kondratev. Teplovie izmereniya. – M: Mashgiz, 1957, pp. 132-168

  3. V.N.Shlyannikov.Problemi teplomassoobmena i gidrodinamiki v energomashinostroenii. Materiali docladov. Conference book, Kazan, Russia, 15-17 september 2010, pp. 120-124

  4. Peters I.Axaopoulos. Experimental exercises on Solar and Wind Energy. Athens, 2009, pp. 43-47

  5. S.V.Mishenko, A.G.Tkachyov. Uglerodnie nanomateriali. Proizvodstvo, svoystva primeneniye. – Moscov, “Mashinostroenie”, 2008, pp. 40-54

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